Massac County RainfallUnited StatesILMassac County95%Metropolis 95% Chance 95%Brookport 95% Chance 90%Mermet Lake 90% Chance Big BayBoazBrookportCretaceous Hills Nature PreserveFort Massac State ParkHillermanJoppaMassac Forest Nature PreserveMermetMermet LakeMetropolisMetropolis Municipal AirportNew ColumbiaRound KnobSamothShady GroveUnionville